<template>
	<!-- 打卡日历页面 -->
	<view class='all'>
		<view class="bar">
			<!-- 上一个月 -->
			<view class="previous" @click="handleCalendar(0)">
				<button class="barbtn" v-if="langType=='ch'">上一月</button>
				<button class="barbtn" v-else>Last</button>
			</view>
			<!-- 显示年月 -->
			<view class="date">{{cur_year || "--"}} 年 {{cur_month || "--"}} 月</view>
			<!-- 下一个月 -->
			<view class="next" @click="handleCalendar(1)">
				<button class="barbtn" v-if="langType=='ch'">下一月</button>
				<button class="barbtn" v-else>Next</button>
			</view>
		</view>
		<!-- 显示星期 -->
		<view class="week" v-if="langType=='ch'">
			<view v-for="(item,index) in weeks_ch" :key="index">{{item}}</view>
		</view>
		<view class="week" v-else>
			<view v-for="(item,index) in weeks_en" :key="index">{{item}}</view>
		</view>
		<view  class="myDateTable" :style="{background:color}">
			<view v-for="(item,j) in days" :key="j" class='dateCell'>
				<view v-if="item.date==undefined||item.date == null" class='cell'>
					<text :decode="true">&nbsp;&nbsp;</text>
				</view>
				<view v-else>
					<!-- 已签到日期 -->
					<view v-if="item.isSign == true" @click="clickSignUp(item.date,2)" class='cell greenColor bgWhite  '>
						<text>{{item.date}}</text>
					</view>
					<!-- 漏签 -->
					<view @click="clickSignUp(item.date,0)" class="cell redColor bgGray" 
					v-else-if="cur_year<toYear||(cur_year==toYear&&cur_month<toMonth)||(cur_year==toYear&&cur_month==toMonth&&item.date<today)">
						<!-- 小程序不兼容这个 v-else-if="(new Date(cur_year+'-'+cur_month+'-'+item.date))<(new Date())"> -->
						<text>{{item.date}}</text>
					</view>
					<!-- 今日未签到-->
					<view @click="clickSignUp(item.date,1)" class="cell whiteColor bgBlue" v-else-if="item.date==today&&cur_month==toMonth&&cur_year==toYear">
						<text>签到</text>
					</view>
					<!-- 当前日期之后 -->
					<view class="whiteColor cell" v-else>
						<text>{{item.date}}</text>
					</view>
				</view>

			</view>
		</view>
		<view class='count'>
			<view>本月累积打卡<text class="monthSum">{{signUp.length}}</text>天</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				days: [],
				signUp: [],
				cur_year: 0, //当前选的年
				cur_month: 0, //当前选的月
				repairFlag:true,	//默认支持补签
				cancelFlag:true,	//默认支持取消签到
				today: parseInt(new Date().getDate()), //本日
				toMonth: parseInt(new Date().getMonth() + 1), //本月
				toYear: parseInt(new Date().getFullYear()), //本年
				weeks_ch: ['日', '一', '二', '三', '四', '五', '六'],
				weeks_en: ['Sun', 'Mon', 'Tues', 'Wed', 'Thur', 'Fri', 'Sat'],
				color:""
			};
		},
		props: {
			sendYear: {
				// 年
				type: Number,
				default: new Date().getFullYear()
			},
			sendMonth: {
				// 月
				type: Number,
				default: new Date().getMonth() + 1
			},
			dataSource: { 
				//已签到的数据源
				// ["2021-3-2", "2021-3-3", "2021-3-6", "2021-3-8", "2021-3-12", "2021-3-15"]
				type: Array,
				default: () => {
					return []
				}
			},
			langType: { //只是示例一个翻译而已，要想所有都翻译自己可以再加加
				type: String,
				default: "ch"
			},
			ifrepair:{		//是否支持补签，默认不支持补签
				type: Boolean,
				default: true
			},
			ifcancel:{		//是否支持取消签到，默认支持
				type: Boolean,
				default: true
			},
			upColor:{		//渐变颜色（上）
				type: String,
				default: "#74AADA"
			},
			downColor:{		//渐变颜色（下）
				type: String,
				default: "#94db98"
			}
		},
		created() {
			this.cur_year = this.sendYear;
			this.cur_month = this.sendMonth;
			this.signUp = this.dataSource;
			this.repairFlag = this.ifrepair;
			this.cancelFlag = this.ifcancel
			this.color = "linear-gradient("+ this.upColor + "," + this.downColor + ")"
			this.calculateEmptyGrids(this.cur_year, this.cur_month);
			this.calculateDays(this.cur_year, this.cur_month);
			this.onJudgeSign();
		},
		watch: {
			dataSource: 'onResChange'
		},
		methods: {
			// 获取当月共多少天
			getThisMonthDays(year, month) {
				return new Date(year, month, 0).getDate()
			},
			// 获取当月第一天星期几
			getFirstDayOfWeek(year, month) {
				return new Date(Date.UTC(year, month - 1, 1)).getDay();
			},
			// 计算当月1号前空了几个格子，把它填充在days数组的前面
			calculateEmptyGrids(year, month) {
				//计算每个月时要清零
				this.days = [];
				// 获取到每个月第一天前面有多少个空格
				const firstDayOfWeek = this.getFirstDayOfWeek(year, month);
				if (firstDayOfWeek > 0) {
					for (let i = 0; i < firstDayOfWeek; i++) {
						var obj = {
							date: null,
							isSign: false
						}
						this.days.push(obj);
					}
				}
			},

			// 绘制当月天数占的格子，并把它放到days数组中
			calculateDays(year, month) {

				const thisMonthDays = this.getThisMonthDays(year, month);
				// this.columnsLen=Math.ceil(thisMonthDays/7);
				// console.log(this.columnsLen);
				for (let i = 1; i <= thisMonthDays; i++) {
					var obj = {
						date: i,
						isSign: false
					}
					this.days.push(obj);
				}

			},

			onResChange(newD, oldD) {
				this.signUp = newD;
				this.onJudgeSign();
			},
			
			//匹配判断当月与当月哪些日子签到打卡
			onJudgeSign() {
				var signs = this.signUp;
				var daysArr = this.days;
				for (var i = 0; i < signs.length; i++) {
					var current = new Date(signs[i].replace(/-/g, "/"));
					var year = current.getFullYear();
					var month = current.getMonth() + 1;
					var day = current.getDate();
					day = parseInt(day);
					for (var j = 0; j < daysArr.length; j++) {
						//年月日相同则打卡成功   						
						if (year == this.cur_year && month == this.cur_month && daysArr[j].date == day) { //&& signs[i].isSign == "今日已打卡"
							// console.log(daysArr[j].date, day);
							daysArr[j].isSign = true;
						}
					}
				}
				this.days = daysArr;
			},

			// 切换控制年月，上一个月，下一个月
			handleCalendar(type) {
				const cur_year = parseInt(this.cur_year);
				const cur_month = parseInt(this.cur_month);
				var newMonth;
				var newYear = cur_year;
				if (type === 0) { //上个月
					newMonth = cur_month - 1;
					if (newMonth < 1) {
						newYear = cur_year - 1;
						newMonth = 12;
					}
				} else {
					newMonth = cur_month + 1;
					if (newMonth > 12) {
						newYear = cur_year + 1;
						newMonth = 1;
					}
				}
				this.calculateEmptyGrids(newYear, newMonth);
				this.calculateDays(newYear, newMonth);

				this.cur_year = newYear;
				this.cur_month = newMonth;

				this.signUp = []; //先清空
				this.$emit('dateChange', this.cur_year+"-"+this.cur_month); //传给调用模板页面去拿新数据				
			},

			clickSignUp(date, type) { //type=0补签，type=1当日签到		
				let str = ""
				let clickDate = this.cur_year + "-" + this.cur_month + "-" + date
				if(type == 2){
					str = "取消签到";
					if(!this.cancelFlag){
						return;
					}
					uni.showToast({
						title: str + date + "号",
						icon: 'success',
						duration: 2000
					});					
					for(let n=0; n<this.days.length; n++){
						if(this.days[n].date == date){
							this.days[n].isSign = false;
						}
					}
					this.$emit('clickCancel', clickDate); //传给调用模板页面
				}else{
					str = "签到";
					if (type == 0) {//如果不需要补签功能直接在这阻止不执行后面的代码就行。
						if(!this.repairFlag){
							return;
						}
						str = "补签";
					}
					uni.showToast({
						title: str + "成功" + date + "号",
						icon: 'success',
						duration: 2000
					});
					
					this.$emit('clickChange', clickDate); //传给调用模板页面
					
				}
				
				//refresh
				this.onJudgeSign();

			}
		}
	}
</script>


<style lang="scss">
	.all {
		margin-top: 20rpx;
		.bar {
			display: flex;
			flex-direction: row;
			justify-content: space-between;
			margin: 30rpx 20rpx;
			padding: 10rpx;
			
			.barbtn {
				height: 30px;
				line-height: 30px;
				font-size: 12px;
			}
		}
		
		.week {
			display: flex;
			flex-direction: row;
			justify-content: space-between;
			padding: 20rpx;
			padding-left: 40rpx;
			padding-right: 40rpx;
			margin: 20rpx;
			border-radius: 10px;
			background-color: #fff;
		}
		
		.myDateTable {
			padding: 1vw;
			border-radius: 10px;
			
			.dateCell {
				width: 11vw;
				padding: 1vw;
				display: inline-block;
				text-align: center;
				font-size: 16px;
				
				.cell {
					display: flex;
					border-radius: 50%;
					height:  11vw;
					justify-content: center;
					align-items: center;
				}	
			}
		}
		
		.count {
			margin: 20rpx;
			padding: 30rpx;
			display: flex;
			text-align: center;
			border-radius: 10px;
			flex-direction: column;
			justify-content: center;
			background-color: #fff;
			align-items: center;
			
			.number {
				color: #fff;
				font-size: 60rpx;
				background-color: #94db98;
				width: 100rpx;
				height: 100rpx;
				border-radius: 50%;
				display: flex;
				flex-direction: column;
				justify-content: center;
				margin: 20rpx;
			}
			
			.daynumber {
				display: flex;
				flex-direction: row;
				justify-content: center;
				
				.day {
					margin-top: 50rpx;
				}
			}
			
			text{
				margin: 10rpx;
				
			}
			.monthSum {
				color: red;
				font-size: 40rpx;
			}
		}
		.whiteColor {
			color: #fff;
		}
		
		.greenColor {
			color: #01b90b;
			font-weight: bold;
		}
		
		.bgWhite {
			background-color: #fff;
		}
		
		.bgGray {
			background-color: rgba(255, 255, 255, 0.42);
		}
		
		.bgBlue {
			font-size: 14px;
			background-color: #4b95e6;
		}
		
		.redColor {
			color: #ff0000;
		}
	}
</style>



